9928640290941 has 20 divisors (see below), whose sum is σ = 15704123861052. Its totient is φ = 6229735083648.

The previous prime is 9928640290939. The next prime is 9928640290967. The reversal of 9928640290941 is 1490920468299.

It can be written as a sum of positive squares in 2 ways, for example, as 4140598243716 + 5788042047225 = 2034846^2 + 2405835^2 .

It is not a de Polignac number, because 9928640290941 - 2¹ = 9928640290939 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928640297941) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3605169390 + ... + 3605172143.

Almost surely, 2^{9928640290941} is an apocalyptic number.

It is an amenable number.

9928640290941 is a deficient number, since it is larger than the sum of its proper divisors (5775483570111).

9928640290941 is a wasteful number, since it uses less digits than its factorization.

9928640290941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7210341562 (or 7210341553 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 9928640290941 in words is "nine trillion, nine hundred twenty-eight billion, six hundred forty million, two hundred ninety thousand, nine hundred forty-one".